Bearing



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y LORENZO stares retratar serieus.

E. Werra, OE vrmirino, OHIO, .essienon 'ro TEE rOLEnOi/riLILINGirAOHINE f I Y ooMPnNY,-'OETOLEEO, Onrdnconrona'rron Aor" nEifawnEE.

EEAErNe.

Macnee.

T all whom t mai/concern: y Be it known that I, LORENZO VAITE,

i a citizen of the United States, residing at Toledo, in the county of'Lucas and `State of Ohio, have ,invented new and useful lm,-

provements in Bearings, of which the fol-H lowing is a specification.

My invention relates to bearings provided with improved means for lubricating the same. lt is illustrated by its application toa vertical bearing for the operationr of the spindle of vertical milling machines, but

it may be applied to various other bearings, whether vertical,horizontal, or inclined.

It yis thel Object of this inventionntoprof vide adequate lubrication for bearings, vpar,-

l `ticularly those to which it is diicult to feed oil by ordinary means. nvertical! drilling machines, in-which two sleeves rotatingin the same-direction at different speeds` and concentric with -the spindle are employed,

. it is difficultto lubricate the bearingsurfaces between the-two sleeves.k lfhave provided means for. properly lubricating suchsurfaces, but I do not limit my invention to such surfaces, as Ind it may be adopted for lubricating other types of bearing surfaces'.

My inventionhprovides .a great saving of oil and prevents oilfrom being fed downy past the bearing and thence down to the tool in the spindle.l

ieferring to the accompanying drawing, Fig. 1 is in part a side elevation and in part a vertical section of a structure embodying my invention; Fig. 2, a similar view with the parts rotated axially a half revolution; Fig. 3, a section on the line III-III on Fig. 1; and Fig. 4, a section on the line IV-IV on Fig. 3. y

vOn the drawing, 1 designates the spindle of a vertical milling machine, and 2 the sleeve surrounding lthe same. The sleeve is keyed to the spindle and has the spur gear 3 secured to its lower end and concentric with the spindle.

4 is a second sleeve externally concentric with the sleeve 2, and separated from the latter by the bronze bearing sleeve 5 rotatable with the sleeve 4. 6 is a bearing ring between the top of the gear 3 and the lower end of the sleeve 4. The upper end` of the sleeve 2 is externally threaded and the nut 7 is screwed' thereon down on the upper end of the sleeves 4 and 5, but permitting the last named sleeves to turn on the sleeve 2.

Specification cf Letters Eatent.

y. Un .the outer cylindrical 'surface of `the sleeve 2 is an endless groove or path, y.come lposed inthe present instance of :a right and a left half-turnof a helical coil,10 representing onehalf turn and :11 .the other. These Patented' Aug.' 15,y 191.22'.

applicati@ filed October is, le20. sexier-iro. 417,744.

half'` turns are preferably elongated inthe ldirection of the axis of thespindle orsleeves,

. andlh'ave theiry upperends joined at 12' near the upper end ofthe sleeve 2, and the lower ends joined at 13 near the lower end thereof,

so as to form a closedy pathv for oil.. ,The f point 12 is joined by the open Oil,feed` groove` 14, extending upon thesurfaceof the sleeve x 2 to the topthereof, and provided withuthe wick 15. The nutsS and 9 have registering j cavities opening into the feed-groove 14 and forming an oil, reservoir 16. Oil iszfed into. f the groove `14'and flows, into the reservoir,

Afrom which. it iows throughthe wick 15 to the said endless groove yorjpath.y

Supposing thatboth leeves and :gears tate in the same direction as indicatedby the arrows and that the sleeve 4 rotates faster than the sleeve 2, the latter rotates on the former in theV same direction. The friction of the sleeve 5 drives the oil down the half" i.

turn 11 and up the half turn 10, so that the oil in the turns has an endless travel.

The oill feeds best around this path when the surrounding air is most effectually preagainst the air by the wick 15, but the access tvented from having access to the endless groove. The point 12 is practically sealed of the air to the point 12might obviously be prevented by other means. The point 13 is sealed against the air by being somewhat above the lower end of .the sleeve 2. The film oil between the sleeves 2 and 5 seals the endless-groove from the air, but if the point 13 or any part of the endless `groove reaches the end of the sleeve 2, air gains access to the groove and destroys the vacuumor partial vacuum, which should exist in the groove to produce most perfectly the endless vtravel of the oil in the two half turns 10 and 11 and prevent the flowing of the oil from the said turns down over the gear 3.

ln order to lubrioate properly the bearing surfaces between the sleeves l and 5 below the point 13, a short groove 17 is provided in the sleeve 2 out of communication with the endless groove, but having its upper end above the point 13 and its lower end atI or close to the lower end of the sleeve 2. As the sleeve 5 turns on the sleeve 2 some oil carriedv around from the point 13 is received by the groove 17 down which the oil flows to complete the lubrication of the sleeve 2. The upper end of this sleeve is lubricated yfrom the'groove 111 or the wick 15, when used, l

1. A pair of co-operating vertical-bearing surfaces, one rotatable on the other, means rotating them in the 'same direction and at di'tl'erentY speeds,- asingle spiraly groove on one-of the surfaces, the said groove beginning near the t'op of the bearing and running thence around the bearing surface 180o to a1 point slightly above the lower end of the bearing, and thence running around the bearing surface 180O to the point of beginning, the groove making a sharp angle at the lower end of the bearing, and means for feeding lubricant to the said point of beginning;v f

'2J A pair of Co-operating vertical bearing surfaces, one-rotatable on the other, means rotating them in the s ame direction and at c different speed-s, a single spiral groove on one of the surfaces, the said groove begin'- ning vnear the top of the bearing and run ning thence around the bearing surface 180O to al point slightly above the lower end of the bearing, and thence running around lthe bearing surface 180O tothe point of beginin the saidmeans, and means feeding the oil y therefrom to the endlessk groove.

4t. A pair of vertical cooperatingbearin'g members, one rotatable within the other, means carried by the' inner member and lying upon the upper end of the'oute'r mem'- ber, an endless groove in the bearing' surface o1c one of the members, the groove stopping short of the upper end of" the outer bearing member, an oil reservoir in the said means, ay groovev leading from the reservoir to the upper end of theendless groove, and a wick in the` former groove.

5. A pair of verticalc'ooperatingfbearing members, one rotatable within theother, a nut carried by the inner member ,andI lying on the'upper end of the outer'member, a jam nut on the iirst nut, an endlessgroove inl the bearing surface of one of the-members', an oil reservoir in the-said nuts, andi means feeding the oil therefrom to the lendless groove.l p

`Signed at Toledo, @him-this" 7thd`ay of October, 1920. l

LORENZO E. WAITE; 

